using telemedical and mobile technologies, verizon innovators are connecting trauma surgeons to patients in the field. helping them get the attention they need, before they even reach the hospital. because the world's biggest challenges deserve even bigger solutions. powerful answers. verizon. >> gretchen: good morning, everybody. today is wednesday, april 17, 2013. i'm gretchen carlson. we appreciate you spending your time with us today. fox news alert now. two big developments in the boston marathon bombing. the f.b.i. investigating photos of an abandoned bag you can see right there right near the finish line. then there are these photos, brand-new images of the mangled metal left behind that's being tested by the military. >> brian: first he called it a tragedy. now a clear message from the president yesterday. >> the f.b.i. is investigating it as an act of terrorism. any time bombs are used to target innocent civilians, it is an act of terror. >> brian: why the change? arles krauthammer will weigh in. >> steve: and that's not all. another terror scare. this one in our nation's capito